CVE-2023-25515: Nvidia GPU Display Driver RCE Vulnerability

CVE-2023-25515 Overview

CVE-2023-25515 is a high-severity vulnerability affecting the NVIDIA GPU Display Driver for both Windows and Linux operating systems. The vulnerability exists due to improper handling of unexpected untrusted data during parsing operations within the driver. When successfully exploited, this flaw can lead to a wide range of severe security impacts including arbitrary code execution, denial of service conditions, privilege escalation, data tampering, and unauthorized information disclosure.

This vulnerability is particularly concerning because it affects a broad range of NVIDIA products across consumer, professional, and enterprise segments, making it a significant threat to organizations and individuals relying on NVIDIA graphics solutions.

Critical Impact

Successful exploitation can result in code execution, denial of service, privilege escalation, data tampering, or information disclosure through improper parsing of untrusted data in the GPU display driver.

Affected Products

• NVIDIA GPU Display Driver for Windows and Linux
• NVIDIA GeForce
• NVIDIA Studio
• NVIDIA NVS
• NVIDIA Quadro
• NVIDIA RTX
• NVIDIA Tesla
• NVIDIA Virtual GPU (vGPU)
• NVIDIA Cloud Gaming

Discovery Timeline

• June 23, 2023 - CVE-2023-25515 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2023-25515

Vulnerability Analysis

This vulnerability stems from the NVIDIA GPU Display Driver's failure to properly validate and sanitize data before parsing. The driver component accepts and processes untrusted input without adequate verification, creating an opportunity for attackers to supply maliciously crafted data that the driver will process in an unexpected manner.

The vulnerability is classified under CWE-822 (Untrusted Pointer Dereference), indicating that the driver may follow a pointer to memory that has been supplied by an untrusted source. This can lead to the driver reading from or writing to arbitrary memory locations, potentially allowing an attacker to manipulate program execution flow or access sensitive data.

Given the physical attack vector requirement, an attacker would need local or physical access to the system to exploit this vulnerability. However, once exploited, the scope is changed, meaning the vulnerable component can impact resources beyond its security scope, potentially affecting the entire system.

Root Cause

The root cause of CVE-2023-25515 lies in insufficient input validation within the NVIDIA GPU Display Driver's data parsing routines. The driver accepts data from external sources without properly verifying that the data conforms to expected formats and boundaries. This allows untrusted pointer dereference operations where the driver may follow memory references controlled by an attacker.

The vulnerability represents a fundamental failure in defensive programming practices, where the assumption that input data will be well-formed leads to processing of maliciously crafted data without proper sanitization.

Attack Vector

Exploitation of CVE-2023-25515 requires physical access to the target system. An attacker with such access could supply specially crafted data to the vulnerable GPU display driver component. The attack does not require user interaction or prior privileges, making it exploitable by anyone who can access the physical machine.

The attack flow typically involves:

1. Gaining physical access to a system with a vulnerable NVIDIA GPU driver
2. Crafting malicious input data designed to exploit the untrusted data parsing flaw
3. Delivering the malicious data to the driver through an available interface
4. The driver parses the untrusted data, potentially dereferencing attacker-controlled pointers
5. This results in code execution, privilege escalation, information disclosure, data tampering, or denial of service

Due to the physical access requirement, this vulnerability is most relevant in scenarios where an attacker has temporary access to workstations, servers, or systems running vulnerable NVIDIA drivers, such as in shared computing environments, data centers, or through insider threats.

Detection Methods for CVE-2023-25515

Indicators of Compromise

• Unexpected system crashes or blue screens related to NVIDIA driver components (nvlddmkm.sys on Windows or nvidia.ko on Linux)
• Abnormal GPU driver behavior including unexpected memory access patterns or driver hangs
• System logs indicating driver errors or kernel-level exceptions originating from NVIDIA modules
• Unusual privilege elevation events coinciding with GPU driver activity

Detection Strategies

• Implement endpoint detection rules to monitor for anomalous behavior in NVIDIA driver processes and kernel modules
• Deploy application whitelisting to prevent unauthorized executables from interacting with GPU driver interfaces
• Configure system event monitoring to alert on driver crashes or unexpected kernel exceptions involving NVIDIA components
• Use memory protection technologies to detect and prevent untrusted pointer dereference attempts

Monitoring Recommendations

• Enable verbose logging for GPU driver components and review logs regularly for signs of exploitation attempts
• Monitor for unauthorized physical access to systems, particularly in shared or public computing environments
• Implement security information and event management (SIEM) rules to correlate GPU driver errors with other suspicious activity
• Deploy file integrity monitoring on NVIDIA driver files to detect unauthorized modifications

How to Mitigate CVE-2023-25515

Immediate Actions Required

• Identify all systems running affected NVIDIA GPU Display Driver versions across your environment
• Prioritize patching systems with physical access exposure, such as workstations in shared environments
• Review and restrict physical access to critical systems running vulnerable NVIDIA drivers
• Apply the latest NVIDIA security updates as specified in the vendor advisory

Patch Information

NVIDIA has released security patches to address CVE-2023-25515. Administrators should consult the NVIDIA Security Bulletin for detailed information on affected driver versions and the corresponding patched releases.

For Windows systems, update the GPU Display Driver through NVIDIA GeForce Experience, the NVIDIA Enterprise driver portal, or by downloading the latest driver directly from NVIDIA's website. For Linux systems, update using the appropriate package manager or by downloading updated drivers from NVIDIA's Unix driver archive.

Ensure that driver updates are tested in a staging environment before widespread deployment, particularly for enterprise and production systems.

Workarounds

• Implement strict physical access controls to limit who can interact directly with affected systems
• Consider disabling or restricting unnecessary GPU driver features until patches can be applied
• Use virtualization or containerization to isolate GPU driver components from critical system resources where possible
• Deploy endpoint security solutions with kernel-level protection capabilities to detect and block exploitation attempts

# Verify current NVIDIA driver version on Linux
nvidia-smi --query-gpu=driver_version --format=csv,noheader

# Check NVIDIA driver version on Windows (PowerShell)
# Get-WmiObject Win32_VideoController | Select-Object Name, DriverVersion

# Update NVIDIA driver on Ubuntu/Debian-based systems
# sudo apt update && sudo apt upgrade nvidia-driver-*